91363861 has 4 divisors (see below), whose sum is σ = 91383552. Its totient is φ = 91344172.

The previous prime is 91363859. The next prime is 91363871. The reversal of 91363861 is 16836319.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91363861 - 2¹ = 91363859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91363861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91363871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386 + ... + 13588.

It is an arithmetic number, because the mean of its divisors is an integer number (22845888).

Almost surely, 2^91363861 is an apocalyptic number.

It is an amenable number.

91363861 is a deficient number, since it is larger than the sum of its proper divisors (19691).

91363861 is a wasteful number, since it uses less digits than its factorization.

91363861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19690.

The product of its digits is 23328, while the sum is 37.

The square root of 91363861 is about 9558.4444864214. Note that the first 4 decimals coincide. The cubic root of 91363861 is about 450.3928437843.

The spelling of 91363861 in words is "ninety-one million, three hundred sixty-three thousand, eight hundred sixty-one".